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Because of their long necks, Giraffes were thought to be completely silent. However, after 8 years of monitoring nearly 1000 hours of audio, researchers determined that giraffes make a deep humming noise at a frequency of 92 hertz.

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Fun Fact: Because of their long necks, Giraffes were thought to be completely silent. However, after 8 years of monitoring nearly 1000 hours of audio, researchers determined that giraffes make a deep “humming” noise at a frequency of 92 hertz.

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